Fix windows build after r17521.

src/utils.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 1065 matching lines @@
   bool operator!=(const EnumSet& set) { return bits_ != set.bits_; }
   EnumSet<E, T> operator|(const EnumSet& set) const {
     return EnumSet<E, T>(bits_ | set.bits_);
   }
 
  private:
   T Mask(E element) const {
     // The strange typing in ASSERT is necessary to avoid stupid warnings, see:
     // http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43680
     ASSERT(static_cast<int>(element) < static_cast<int>(sizeof(T) * CHAR_BIT));
-    return 1 << element;
+    return static_cast<T>(1) << element;
   }
 
   T bits_;
 };
 
 
 class TypeFeedbackId {
  public:
   explicit TypeFeedbackId(int id) : id_(id) { }
   int ToInt() const { return id_; }
@@ skipping 38 matching lines @@
 
   // Every compiled stub starts with this id.
   static const int kStubEntryId = 5;
 
   int id_;
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_UTILS_H_